Wildfire continues to rage across much of the west, and the military has responded by dispatching tanker planes to help battle the blazes. This video shows an Air National Guard crew dropping chemical fire retardant over one of Colorado's wildfires with a C-130 Hercules.

Unfortunately, 14 U.S. Air Force tankers were grounded after one of them crashed in South Dakota Tuesday, killing four crew members and seriously injuring the other two. The crash is still under investigation, but the cause isn't yet known.